Piæ cantiones;
a collection of church & school song, chiefly ancient Swedish, originally published in A. D. 1582 by Theodoric Petri, of Nyland.
Rev. and re-edited, with preface and explanatory notes, by G. R. Woodward, and printed at the Chiswick Press for the Plainsong and Medieval Music Society.

APA Citation

Petri, D., Woodward, G. Ratcliffe., Plainsong and Mediaeval Music Society (Great Britain). (1910). Piæ cantiones: a collection of church & school song, chiefly ancient Swedish, originally published in A. D. 1582 by Theodoric Petri, of Nyland. London.

MLA Citation

Petri, Didrik, fl. 1580-1625, George Ratcliffe Woodward, and Plainsong and Mediaeval Music Society (Great Britain). Piæ Cantiones: a Collection of Church & School Song, Chiefly Ancient Swedish, Originally Published In A. D. 1582 by Theodoric Petri, of Nyland. London, 1910.

Warning: These citations may not always be complete (especially for serials).